Possessing elevated skills with regard to own and customers’ products and environments is crucial in maintaining a leading position in industrial acoustics. Over the years, we have accumulated experience from more-or-less all industries, our skills in this field allow us to choose the optimal, most cost-effective solutions for our customers.

Calling on our wide field of knowledge, we convert theoretical acoustics into functional, cost-efficient solutions to accommodate your specific wishes and requirements. Our great strength is our capacity to deal with the entire chain: from initial needs analysis to final measures, simultaneously providing the requisite noise guarantees so ensure we live up to our customers’ requirements and expectations.

In order to make sure that our products present the acoustic properties that were calculated and promised, we perform a variety of noise measurements, both in the field and in our own sound lab. We check reduction figures, integral attenuation, noise absorption and vibrations on our solutions.

In our sound lab, we also work with ongoing product development and run training courses for our own staff.

It is essential to ensure that the installation of a silencer is correct from the very start. Subsequently remodelling or supplementing a solution can be extremely complicated and costly. For various reasons, however, it can be difficult to take control measurements of a silencer in the field. In such cases, we can run advanced measurements on finished silencers before they are installed, providing customers with confidence – and proof – that their requirements have been met.

One example is that of a flue gas silencer, where we used a large, specially designed loudspeaker comprising 21 loudspeaker components to check performance. The loudspeaker was positioned in the silencer intake, and the noise level was then measured both with and without noise reduction components to allow comparison of the measurement values. In this way, the customer could verify the calculations and measure the efficiency of the silencer.

Noise requirement: Noise effect reduction of 12 dB(A) for chimney opening, where the octave band for 250 Hz is to feature a minimum noise reduction effect of 14 dB.

Result: The requirement was met with a 2.5 dB(A) margin, and with an 11 dB margin for the 250 Hz band.

The pictures here were taken during noise measurement at HIAK and after final assembly in the flue gas duct.